Sienna MillerSienna Miller is reportedly risking texter’s thumb to keep in touch with fiancé Rhys Ifans while she’s filming in Los Angeles.

The actress is currently in California working on her new movie, GI Joe and an on-set source told the Mirror: “Sienna is missing Rhys massively and they have stayed in constant contact.”

“She boasted that they sent each other 53 texts in the space of eight hours. Everyone’s been saying she must have had smoke coming out of her mobile.”

“We’ve also been telling her that if she doesn’t calm down she’ll end up with repetitive strain injury - and won’t ever be able to text him again!”

“Sienna’s started trying to use alternate hands to give her thumbs a bit of a break.”